虜

1. Origins, structure, and basic meaning

• Structure: 虜 (とりこ) can mean a captive held by an enemy or a person captivated by charm.
• Basic usage: 敵の虜となった is a soldier physically captured; 魅力の虜になった is figurative enchantment by a singing voice.

2. Common pitfalls and similar expressions

• Prisoner of war and person captivated by charm
  • Both combine with change verbs, but one is physical confinement and the other strong fascination. The latter に construction is not literal imprisonment.